Pulley.



No. 841,682. PATENTED JA 2,2, 190?. G. A. GILBERT. PULLEY.

APPLICATION FILED MAR. 8, 1904.

. application filed by me on July 6, 1903, Serial No.. 164,425, and is designed as an improve- GEORGE A. GILBERT, OF CHICAGO, ILLINOIS.

YPULLEY.

Specification of Letters Patent.

Patented Jan. 22, 1907;

Application filed March 8, 1904. Serial No. 197,076

To otZZ whom it may concern:

Be it known that I, GEORGE A. GILBERT, a citizen of the United States, residing. at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pulleys, of which the following is a specification.

My invention relatesto belt-pulleys, more particularly to ulleys of small size,'although the same may .'nd application for other purposes, such as shaft-couplings.

My present pulley belongs to the same type of pulley as that described and claimed in an ment thereof, theobject of my. invention being to increasetheefliciency, strength, and durability of such. pulley, as will be made apparent from the description hereinafter given.

In the accompanying drawings, Figure 1 is a perspective View of one form of my improved pulley embodying my invention, but with the'outershell removed; Fig. 2, a perspective view of one-half of such outer shell; Fig. 3, a cross-section of the complete pulley; Fig. 4, a View corresponding to Fig. 3, but illustrating another method of securing or anchoring the longitudinal edges of the outer shell Fig. 5, a perspective view of the outer shell of the pulley of Fig. 4; Fig. 6, a perspective view showing the construction of the tongues C and Fig. 7 a section of a modified form of construction of the means for preventing inward displacement of the outer shells.

Corresponding parts in the several views or figures are designated by the same referenceletters.

The foundation of my improved pulley is made similar to that shown and described in the application aforesaid, the same consisting of two halves, each comprising, essentially, a hub portion A, end flanges B, and side flanges C, as shown in Fig. 1. The two halves are applied to a shaft and clamped thereto by bolts D, passing through said side flanges.

The outer -shell, which completes the pul ley, is also made in two halves and consists of two sheet-metal shells F, substantially semicircular in cross-section. If desired, each shell may be secured along its central longitudinal line to the inner shell or hub portion by means of screws G, passing through the shell and entering screw-threaded holes in a longitudinal cross-bar E, secured between the end'flanges B, as in said prior application. be dispensed with and longer screws G may be provided to engage the hub A itself, as indicated 1n Fig. 4.

My improvement-resides in the novel and eflicient means for securing or'anchoring the longitudinal edges of'the outer: shells to the hub structure. Referring to Figs.- 1, 2, and

3, such means comprise a series of projecting lugs or tonguesf, arranged along the longitudinal edges of the shells F at intervals and adapted to enter and be retained by a corresponding series of holes 0 in the side flanges C of the hub structure of the pulley. By these means the parts of the pulley are securely and firmly locked togetherand the longitudinal edges of the shells are anchored in proper position and prevented from bulgingoutwardly, however great may be the strain on the other portions of the outer shell.

Instead of being a series of tongues the anchoring means may be a continuous flange F on each-longitudinal edge of the shell F, each flange F being inwardly directed for the purpose of engaging behind an u turned flange C of its adjacent side flange all as clearly illustrated in Figs. 4 and 5. Moreover, the flanges F are held or secured against inward displacement by means of a series of tongues C struck up from the body of the flanges C and arran ed to form an inner stop or abutment for t e flanges F.

In Fig. 7 I have shown amodified form of construction of the means for preventing inward movement and displacement of the outer shells, in which the outer edges of the flanges of the hub portions A are each folded to socket form, thereby providing the upturned edge C, as before, and also a shoulder 0 by which the edges of the outer shells are held in place against inward movement.

I claim 1. A pulley made in halves, each comprising a hub portion having end and side flanges, and an outer shell having interlocking connection with said side flanges.

2. A pulley made in halves, each comprising a hub portion havin side flanges, an outer shell concentric wit the hub portion and having interlocking connection with said flanges, and semicircular flanges B arranged at the ends of said hub and shell.

3. A pulley made in halves, each comprising a hub portion having end and side flanges, and an outer shell concentric with the hub As in such application, the bar E may portion and having interlocking connection as to its longitudinal edges with the hub portion.

4. A pulley made in halves, each comprising a hub portion A, end flanges B and side flanges C, clamping-bolts D passed through the flanges C, and the two-part outer shell F having interlocking connection with the side flanges C. p

5. A pulley made in halves, each comprising a hub portion A, end flanges B and side flanges C, clamping-bolts D passed through the flanges C, and the two-part outer shell F having interlocking connection as to its longitudinal edges with the side flanges.

6. A pulley made in halves, each comprising a hub portion A and side flanges C, having a series of holes 0, clamping-bolts passed through the flanges C, and the two-part outer shell F having a series of tongues f projecting from its longitudinal edges and arranged to enter said holes 0.

7. A pulley made in halves, each comprising a hub portion A, and side flanges C having a series of holes 0, clamping-bolts passed through the flanges C, the two-part outer shell F having a series of tonguesfproj ecting from its longitudinal edges and arranged to enter said holes 0, and a longitudinal bar E secured toeach hub portion, said outer shell being secured to said bars E.

8. A pulley made in halves, each comprising a hub portion having end and side flanges, an outer shell fitting over said end flanges, and means for securing the longitudinal edges of such outer shell to said side flanges.

9. A pulley made in halves, each comprising a hub portion having side flanges, an outer shell, means for securing the longitudinal edges of such outer shell to said side flanges against lateral displacement and a longitudinal bar E to which the outer shell is secured along the line intermediate its said ed es.

i0. A pulley made in halves, each comprising a hub portion having end and side flanges, an outer shell fitting over said end flanges, and means for securing the longitudinal edges to the side flanges against both inward and outward movement.

11. A pulley made in halves, each compris-- ing a hub portion having end and side flanges, an outer shell having its longitudinal edges interlocked with the hub portion, and means for preventing lateral movement of such edges, and a bar E which connects the end flanges and to which the outer shell is secured along the line intermediate its said edges.

GEORGE A. GILBERT. Witnesses:

DAvID Low, LOUIS B. ERWIN. 

